Interesting facts about your
brain and intelligence
- Your brain has about 100 billion neurons.
A typical brain cell has from 1,000 to 10,000 connections to other brain
- Studies have shown that children who are
breast fed display IQ's up to 10 points higher by the age of three.
- Your brain is full of nerve cells, but it
has no pain receptors. Doctors can operate on your brain while you're
awake and you won't feel a thing.
- The right side of your brain controls the
left side of your body, and the left side of your brain controls the right
side of your body.
- Your brain weight accounts for about 2
percent of your body weight. But your brain uses 20 percent of your body's
oxygen supply and 20 to 30 percent of your body's energy.
- When you are born, your brain weighs about
a pound. But by age 6, it weighs three pounds. What happens? Learning to
stand, talk, and walk creates a web of connections in your head—two pounds
- People with lower IQ are at greater risk
of being concussed. A Danish study looked at 520 men who had sustained
concussion after having their IQs tested by the national draft board. 30.4
percent of the concussed men had had dysfunctional scores. Experts decided
lower IQ is a risk factor.
- An analysis of 1 million students in a New
York school district showed that school cafeteria food affected IQ scores
to an astonishing degree. When preservatives, coloring, dyes and
artificial flavors were removed from the cafeteria menu researchers found
that 70,000 students performed two or more IQ grade levels higher than
- Even though there are huge differences in
weekly earnings between people of various educations levels there are also
great discrepancies between people with comparable schooling and higher
- Social class is just one of many factors,
both environmental and genetic, that may impact on a child's IQ. Others
can include: diet, birth weight, parental IQ and even if the child gets
hugged a lot!
- IQ tests can’t measure all forms of
intelligence. It’s widely agreed that standardized tests can’t measure all
forms of intelligence including creativity, wisdom, practical sense and
- Some researchers say that IQ - a predictor
of income - is partly inherited. Researchers compared the incomes of
fathers and sons and found if you were in the bottom five percent of
society you had a one in 20 chance or less of getting to the top.
- IQ is not influenced by family size or
birth order. There is some confusion on this matter due to the fact that
smart families usually have few children. However there is absolutely no
evidence to suggest that you will have a low IQ if you belong to a large
family. There is also no evidence that the first born child will be more
intelligent than the rest.
- In the USSR even mentioning IQ was a
- Someone considered a good mind-reader is
actually smart. This was found in an Estonian study. Even if you accept a
skeptic's argument — that "mind readers" are simply those bright enough to
pick up on body language and behavior — they still have to be bright to do
- Feeling rejected has an effect on your IQ
score. Ohio researchers claim IQ can plummet by 25 percent after being
rejected. It's harder to think straight after rejection.
- Certain smells may improve your ability to
pass exams. British research indicates students revising for exams could
use scent to improve their marks, but also that smells associated with
failure can worsen results. The smell of rosemary is also said to enhance
- In 1984 the political scientist James
Flynn reported that Americans had gained about 13.8 IQ points in 46 years.
If people taking an IQ test today were scored in the same way as people 50
years ago then 90% of them would be classified in the genius level.
- A message for action travels from your
brain to your muscles as fast as 250 miles per hour.
- Studies show that IQ is modestly related
to the speed at which you do some pretty simple things such as comparing
two lines to see which is longer.
- Wine drinkers on average have a higher IQ
than beer drinkers. Studies show a slight advantage to wine drinkers — but
do wine drinkers have higher IQs because they drink wine or vice-versa ?
It may be that some people with high IQ reach a high social status and
then choose to drink wine to fit in.
- Modern neuro-imaging techniques show that
to some degree brain size is correlated to IQ.
- IQ has been shown to increase with more
schooling, better educated parents and better toys.
- A higher IQ employee will be more
productive than a lower IQ employee even after years on the same job